Centrifugal drier.



No. 726,696. PATENTED APR. 28,1903;

' M. 0.: KASSON.

GENTRIPUGAL DRIER.

APPLICATION FILED M AY 8. 1902.

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MAHLON O. KASSON, OF SANDYIIILL, NEW YORK, AS SIGNOR TO UNION BAG (it PAPER COMPANY, A CORPORATION OF NEW JERSEY.

CENTRIFUGAL DRIER.

SPECIFICATION formingpart of Letters Patent no. 726,696, dated April as, 1903.

Application filed May 8, 15 l02. Serial No. 106,430. (No model.)

To all whom it may concern:

Be it known that I, MAHLON O. KASSON, a citizen of the United States, residing at Sandyhill, New York, have invented certain new and useful Improvements in Centrifugal Driers, of which the following is a clear, full, and exact description.

My invention relates to a centrifugal drier; and one of my objects is to provide such a drier which will both expel the water by centrifugal action and remove the dried materialduring the operation of the drier.

My invention will be defined in the claims. In the drawings showing the preferred em bodiment of my invention, Figure l is a central vertical section, parts being shown in elevation; and Fig. 2 is a section of a detail on line as a of Fig. 1.

In the drawings, 1 is a rotatable drum ,pro- 5 vided with a number of perforations 2,through 1 which the fluid is expelled by centrifugal action. The drum may have a solid head 3, to which a pulley 4 is attached, by which the drum may be rotated by means of a belt 4 as shown. 5 is a cover for the drier and against which the expelled water strikes. The drum may, if desired, rotate on a fixed hollow head 6, into which the undried material (such as wood-pulp) flows from pipe 7. The pulp is preferably injected into the drum, and one form of an injector is shown as propellerblades 8, fixed in pulley 4 to the drum. The injected pulp preferably strikes against a disk 9 to prevent the pulp from being injected too far into the drum.

In order to move the pulp along in the drum during the rotation thereof, I have provided a conveying device therefor, which in the present embodiment consists of a screwlO, at-

tached to a shaft 11, which is rotatable by. polley l2 and belt 12 independently of and at a different speed from the drum 1. In the present embodiment the screw 10 is right-handed, and if both the drum and shaft are rotated from left to right, as shown by the arrows, and the drum rotated at a slightly-greater angular speed than the screw the screw will operate as though the screw were stationary and the drum slowly rotating clockwise. The centrifu gal action expels the water from the pulp through the drum, and the dried pulp will pack against the inside periphery of the drum, and the threads of the screw will slowly drag it along toward the left and force it out of the open left end of the drum during the operation of the drier. The operation will thus be continuous, as the undried pulp can be fed into the drier in a continuous stream and the dried pulp removed from the drum. I may provide arms 13, attached to drum 1 and bearing on shaft '11 to support the drum, which have sharp edges and inclined faces, as shown in Fig. 2, which will aid the screw 10 in expelling the pulp from the drum.

As the drier operates the thrust of the screw toward the left exerts a drag toward the left upon the drum as the pulp is moved along, and in order. to partially balance the drum I have provided propeller-blades 8, which are attached to the drum and constitute one form of an injector. The thrust of these blades against the pulp tends to drag the drum toward the right, and consequently more or less counteracts the d rag of the screw thereon towardthe left.

I am aware that many variations from the above construction may be made without departing from my invention as claimed, and I therefore do not limit myself to theembodiment herein described and illustrated.

What I claim is 1. In a centrifugal drier in combination, a rotatable perforated drum and means to rotate the same ata rapid rate to expel the fluid through said drum by centrifugal action, and a screw within said drum adapted to move the dried material along in said drum during the drying operation, and an injector for the material to be dried, rotatable with and connected to said drum and adapted to par tially counterbalance the drag of said screw on said drum.

2. In a centrifugal drier in combination, a

rotatable perforated drum and means to r0- tate the same at arapid rate to expel the fluid through said drum by centrifugal action, and

a screw within'said drum rotatable at a different speed from said drum and adapted to move the dried material along in said drum during the drying operation, and an injector I00 for the material to be dried, carried by said drum and adapted to partially counterbal ance the drag of said screw on said drum.

3. In a centrifugal drier in combination, a rotatable perforated drum and means to rotate the same at a rapid rate and expel the fluid through said drum by centrifugal action, a screw located within, but rotatable independently of, said drum, and having the threads thereof extending close to the inside of said drum, and means to rotate said screw at a speed different from that of said drum, whereby the dried material is carried along in said drum during the drying operation, and an injector for the material to be dried, rotatable with and connected to said drum and adapted to partially counterbalance the drag of said screw upon said drum, and a plate against which the injected material strikes.

4:. In a centrifugal drier in combination, a rotatable perforated drum and means to rotate the same at a rapid rate and expel the fluid through said drum by centrifugal action, said drum having an entrance-passage for the material to be dried, a conveying. device within said drum adapted to move the dried material along in said drum during the rotation thereof, and an injector for said material to be dried, said injector connected with said drum whereby it is adapted to partially counterbalance the drag of said conveyer on said drum.

5. In a centrifugal drier in combination, a rotatable perforated drum and means to rotate the same at a rapid rate and expel the fluid through said drum by centrifugal action, said drum having an entrance-passage for the material to be dried, a conveying device within said drum adapted to move the dried material along in said drum during the rotation thereof, and a rotatableinjector carried by said drum and adapted to inject said material into said drum and partially counterbalance the drag of said conveyer on said drum.

6. In a centrifugal drier in combination, a rotatable perforated drum, means to rotate the same at a rapid rate to expel the fluid through said drum by centrifugal action, said drum having an entrance-passage for the material to be dried, a conveying device within said drum adapted to move the dried material along in said drum during the rotation thereof, and a rotatable injector carried by said drum and comprising a plurality of propeller-blades adapted to inject said material into said drum to partially counterbalance the drag of said conveyer on said drum.

7. In a centrifugal drier in combination, a rotatable perforated drum and means to rotate the same at a rapid rate and expel the fluid through said drum by centrifugal action, an entrance-port for the material to be dried, a screw located within said-drum and having the threads extending close to the inner periphery of said drum, and means to 1'0- tate said screw at a different speed from said drum whereby said screw operates on the material within said drum during the drying operation, a rotatable injector for the undried material carried by said drum and adapted to partially counterbalance the drag of said screw on said drum, said drum being provided with an exit for said dried material during said drying operation.

Signed at Sandyhill, New York, this 5th day of May, 1902.

MAHLON O. KASSON.

Witnesses:

G. E. REID, E. A. GETTEN. 

